/*
 * Copyright (c) 2015 Typelevel
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package cats.kernel.laws

import cats.kernel.Eq
import org.scalacheck.Prop
import org.scalacheck.util.Pretty

package object discipline {
  implicit def catsLawsIsEqToProp[A](isEq: IsEq[A])(implicit ev: Eq[A], pp: A => Pretty): Prop =
    isEq match {
      case IsEq(x, y) =>
        if (ev.eqv(x, y)) Prop.proved
        else
          Prop.falsified :| {
            val exp = Pretty.pretty[A](y, Pretty.Params(0))
            val act = Pretty.pretty[A](x, Pretty.Params(0))
            s"Expected: $exp\n" + s"Received: $act"
          }
    }
}
